# Uncountable External API

**Canonical:** https://apis.io/apis/uncountable/uncountable-external-api/  
**Provider:** Uncountable — https://apis.io/providers/uncountable/  
**Base URL:** https://app.uncountable.com/api/external  
**Documentation:** https://app.uncountable.com/docs

Uncountable External API is one of 2 APIs that [Uncountable](https://apis.io/providers/uncountable/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include R&D Data, Laboratory Informatics, and Listing Configuration. The published artifact set on APIs.io includes authentication docs.

The Uncountable External API is the authenticated REST surface of the Uncountable R&D platform. Its documented entry point is the list_entities endpoint, which returns rows from a Listing Configuration defined in the Uncountable UI rather than querying entities directly. It is protected by OAuth 2.0 (authorization code with PKCE) using the EXTERNAL_API_READ and EXTERNAL_API_WRITE scopes, or by basic authentication for legacy use, and enforces the same role-based permissions as the web application. Full endpoint and parameter reference is published behind the application sign-in at /docs.

## Machine-readable artifacts (5)

- **Authentication** — https://raw.githubusercontent.com/api-evangelist/uncountable/refs/heads/main/authentication/uncountable-authentication.yml
- **OAuthScopes** — https://raw.githubusercontent.com/api-evangelist/uncountable/refs/heads/main/scopes/uncountable-scopes.yml
- **Conventions** — https://raw.githubusercontent.com/api-evangelist/uncountable/refs/heads/main/conventions/uncountable-conventions.yml
- **ErrorCatalog** — https://raw.githubusercontent.com/api-evangelist/uncountable/refs/heads/main/errors/uncountable-problem-types.yml
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/uncountable/refs/heads/main/apis.yml

## Other Uncountable APIs (1)

- [Uncountable MCP Server](https://apis.io/apis/uncountable/uncountable-mcp/)

## Tags

R&D Data, Laboratory Informatics, Listing Configuration

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/uncountable/uncountable-external-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/uncountable/.